CAJ | 학술논문

在低辊径?厚度比下，研究摩擦因数在宽展公式中的作用，摩擦因数对展宽的作用主要体现在接触面的粗糙程度。经过5组不同的铅轧实验，获得不同等级的摩擦因数。随着宽厚比、压下率和辊径?厚度比的改变，可以得到不同的名义摩擦因数并应用在相应的公式中。随后提出一个拟合公式，通过与232次实验结果进行比较，验证拟合得到的名义摩擦因数的误差低于12%。通过一定次数的自学习修正，该误差减少至2%以下。最终实现通过可以变化的名义摩擦因数对宽展进行更加精确的预测。在真正的工作环境下使用名义摩擦因数，得到的宽展预测误差也小于2%。在实际生产中验证，得到了一个能够对宽展公式中摩擦因数进行设置的参考和解决方法，从而满足工业生产的应用。
재저곤경?후도비하，연구마찰인수재관전공식중적작용，마찰인수대전관적작용주요체현재접촉면적조조정도。경과5조불동적연알실험，획득불동등급적마찰인수。수착관후비、압하솔화곤경?후도비적개변，가이득도불동적명의마찰인수병응용재상응적공식중。수후제출일개의합공식，통과여232차실험결과진행비교，험증의합득도적명의마찰인수적오차저우12%。통과일정차수적자학습수정，해오차감소지2%이하。최종실현통과가이변화적명의마찰인수대관전진행경가정학적예측。재진정적공작배경하사용명의마찰인수，득도적관전예측오차야소우2%。재실제생산중험증，득도료일개능구대관전공식중마찰인수진행설치적삼고화해결방법，종이만족공업생산적응용。
Friction coefficients in spread formulas were studied under low width-to-thickness ratio. The effects of all the factors on friction were considered as different roughness of surfaces. After lead rolling experiments in 5 different roughness grades, friction coefficients were obtained. With changing width-to-thickness ratio, reduction rate and ratio of diameter of roller to thickness, all the nominal friction coefficients which can be used in these formulas were calculated. Then, a fitting expression was proposed, comparing with the results measured in 232 times tests, the errors of the nominal friction coefficients calculated by the expression are mostly less than 12%. After a certain times self-learning, the errors are no more than 2%. With the varying nominal friction coefficients, the spread will be predicted more accurately. When the nominal friction coefficient is used to predict the spread under the real working condition, the results calculated are also in agreement with the measured ones, and the errors are less than 2%. This credible reference and solution about how to set the friction coefficient in spread formulas would also be used in practical industrial production.